1 /* ex - Exception Handling */
3 /* Copyright (c) 2005-2014. The SimGrid Team.
4 * All rights reserved. */
6 /* Copyright (c) 2002-2004 Ralf S. Engelschall <rse@engelschall.com> */
7 /* Copyright (c) 2002-2004 The OSSP Project <http://www.ossp.org/> */
8 /* Copyright (c) 2002-2004 Cable & Wireless <http://www.cw.com/> */
9 /* All rights reserved. */
11 /* This code is inspirated from the OSSP version (as retrieved back in 2004)*/
12 /* It was heavily modified to fit the SimGrid framework. */
14 /* The OSSP version has the following copyright notice:
15 ** OSSP ex - Exception Handling
16 ** Copyright (c) 2002-2004 Ralf S. Engelschall <rse@engelschall.com>
17 ** Copyright (c) 2002-2004 The OSSP Project <http://www.ossp.org/>
18 ** Copyright (c) 2002-2004 Cable & Wireless <http://www.cw.com/>
20 ** This file is part of OSSP ex, an exception handling library
21 ** which can be found at http://www.ossp.org/pkg/lib/ex/.
23 ** Permission to use, copy, modify, and distribute this software for
24 ** any purpose with or without fee is hereby granted, provided that
25 ** the above copyright notice and this permission notice appear in all
28 ** THIS SOFTWARE IS PROVIDED `AS IS'' AND ANY EXPRESSED OR IMPLIED
29 ** WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
30 ** MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
31 ** IN NO EVENT SHALL THE AUTHORS AND COPYRIGHT HOLDERS AND THEIR
32 ** CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
33 ** SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
34 ** LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
35 ** USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
36 ** ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
37 ** OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
38 ** OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
42 /* The extensions made for the SimGrid project can either be distributed */
43 /* under the same license, or under the LGPL v2.1 */
48 #include "portable.h" /* execinfo when available */
51 #include "xbt/synchro_core.h"
52 #include "xbt_modinter.h" /* backtrace initialization headers */
54 #include "xbt/ex_interface.h"
57 #if defined(HAVE_EXECINFO_H) && defined(HAVE_POPEN) && defined(ADDR2LINE)
58 # define HAVE_BACKTRACE 1 /* Hello linux box */
61 #if defined(_XBT_WIN32) && defined(_M_IX86) && !defined(__GNUC__)
62 # define HAVE_BACKTRACE 1 /* Hello x86 windows box */
66 XBT_LOG_NEW_DEFAULT_SUBCATEGORY(xbt_ex, xbt, "Exception mecanism");
68 XBT_EXPORT_NO_IMPORT(const xbt_running_ctx_t) __xbt_ex_ctx_initializer = XBT_RUNNING_CTX_INITIALIZER;
70 /* default __ex_ctx callback function */
71 xbt_running_ctx_t *__xbt_ex_ctx_default(void)
73 /* Don't scream: this is a default which is never used (so, yes,
74 there is one setjump container by running entity).
76 This default gets overriden in xbt/xbt_os_thread.c so that it works in
77 real life and in simulation when using threads to implement the simulation
78 processes (ie, with pthreads and on windows).
80 It also gets overriden in xbt/context.c when using ucontexts (as well as
81 in Java for now, but after the java overhaul, it will get cleaned out)
83 static xbt_running_ctx_t ctx = XBT_RUNNING_CTX_INITIALIZER;
88 /* Change raw libc symbols to file names and line numbers */
89 void xbt_ex_setup_backtrace(xbt_ex_t * e);
91 void xbt_backtrace_display(xbt_ex_t * e)
93 xbt_ex_setup_backtrace(e);
97 fprintf(stderr, "(backtrace not set)\n");
101 fprintf(stderr, "Backtrace (displayed in thread %p):\n",
102 (void *) xbt_thread_self());
103 for (i = 1; i < e->used; i++) /* no need to display "xbt_backtrace_display" */
104 fprintf(stderr, "---> %s\n", e->bt_strings[i] + 4);
107 /* don't fool xbt_ex_free with uninitialized msg field */
112 XBT_ERROR("No backtrace on this arch");
116 /** \brief show the backtrace of the current point (lovely while debuging) */
117 void xbt_backtrace_display_current(void)
120 xbt_backtrace_current(&e);
121 xbt_backtrace_display(&e);
124 #if defined(HAVE_EXECINFO_H) && defined(HAVE_POPEN) && defined(ADDR2LINE)
125 # include "backtrace_linux.c"
126 #elif (defined(_XBT_WIN32) && defined (_M_IX86)) && !defined(__GNUC__)
127 # include "backtrace_windows.c"
129 # include "backtrace_dummy.c"
132 /** @brief shows an exception content and the associated stack if available */
133 void xbt_ex_display(xbt_ex_t * e)
135 char *thrower = NULL;
138 "** SimGrid: UNCAUGHT EXCEPTION received on %s(%d): category: %s; value: %d\n"
140 "** Thrown by %s()%s\n",
141 xbt_binary_name, xbt_getpid(),
142 xbt_ex_catname(e->category), e->value, e->msg,
143 e->procname, thrower ? thrower : " in this process");
144 XBT_CRITICAL("%s", e->msg);
148 xbt_ex_setup_backtrace(e);
150 #ifdef HAVE_BACKTRACE
151 if (e->used && e->bt_strings) {
152 /* We have everything to build neat backtraces */
155 fprintf(stderr, "\n");
156 for (i = 0; i < e->used; i++)
157 fprintf(stderr, "%s\n", e->bt_strings[i]);
164 "** In %s() at %s:%d\n"
165 "** (no backtrace available)\n",
166 e->func, e->file, e->line);
171 /* default __ex_terminate callback function */
172 void __xbt_ex_terminate_default(xbt_ex_t * e)
178 /* the externally visible API */
179 XBT_EXPORT_NO_IMPORT(xbt_running_ctx_fetcher_t) __xbt_running_ctx_fetch = &__xbt_ex_ctx_default;
180 XBT_EXPORT_NO_IMPORT(ex_term_cb_t) __xbt_ex_terminate = &__xbt_ex_terminate_default;
183 void xbt_ex_free(xbt_ex_t e)
190 for (i = 0; i < e.used; i++)
191 free(e.bt_strings[i]);
194 /* memset(e,0,sizeof(xbt_ex_t)); */
197 /** \brief returns a short name for the given exception category */
198 const char *xbt_ex_catname(xbt_errcat_t cat)
202 return "unknown error";
204 return "invalid argument";
206 return "out of bounds";
209 case not_found_error:
212 return "system error";
214 return "network error";
218 return "action canceled";
220 return "thread error";
222 return "host failed";
224 return "tracing error";
231 return "INVALID ERROR";
239 XBT_TEST_SUITE("xbt_ex", "Exception Handling");
241 XBT_TEST_UNIT("controlflow", test_controlflow, "basic nested control flow")
246 xbt_test_add("basic nested control flow");
250 xbt_test_fail("M1: n=%d (!= 1)", n);
254 xbt_test_fail("M2: n=%d (!= 2)", n);
256 THROWF(unknown_error, 0, "something");
260 xbt_test_fail("M3: n=%d (!= 3)", n);
267 xbt_test_fail("M2: n=%d (!= 5)", n);
269 THROWF(unknown_error, 0, "something");
273 xbt_test_fail("M3: n=%d (!= 6)", n);
278 xbt_test_fail("MX: n=%d (shouldn't reach this point)", n);
282 xbt_test_fail("M4: n=%d (!= 7)", n);
287 xbt_test_fail("M5: n=%d (!= 8)", n);
290 XBT_TEST_UNIT("value", test_value, "exception value passing")
295 THROWF(unknown_error, 2, "toto");
298 xbt_test_add("exception value passing");
299 if (ex.category != unknown_error)
300 xbt_test_fail("category=%d (!= 1)", (int)ex.category);
302 xbt_test_fail("value=%d (!= 2)", ex.value);
303 if (strcmp(ex.msg, "toto"))
304 xbt_test_fail("message=%s (!= toto)", ex.msg);
309 XBT_TEST_UNIT("variables", test_variables, "variable value preservation")
313 int _XBT_GNUC_UNUSED r2;
317 r1 = r2 = v1 = v2 = 1234;
321 THROWF(unknown_error, 0, "toto");
324 xbt_test_add("variable preservation");
326 xbt_test_fail("r1=%d (!= 1234)", r1);
328 xbt_test_fail("v1=%d (!= 1234)", v1);
329 /* r2 is allowed to be destroyed because not volatile */
331 xbt_test_fail("v2=%d (!= 5678)", v2);
336 XBT_TEST_UNIT("cleanup", test_cleanup, "cleanup handling")
342 xbt_test_add("cleanup handling");
348 THROWF(1, 2, "blah");
352 xbt_test_fail("v1 = %d (!= 5678)", v1);
357 xbt_test_fail("v1 = %d (!= 5678)", v1);
358 if (!(ex.category == 1 && ex.value == 2 && !strcmp(ex.msg, "blah")))
359 xbt_test_fail("unexpected exception contents");
363 xbt_test_fail("xbt_ex_free not executed");
368 * The following is the example included in the documentation. It's a good
369 * idea to check its syntax even if we don't try to run it.
370 * And actually, it allows to put comments in the code despite doxygen.
372 static char *mallocex(int size)
377 #define SMALLAMOUNT 10
378 #define TOOBIG 100000000
380 #if 0 /* this contains syntax errors, actually */
381 static void bad_example(void)
390 char *cp1, *cp2, *cp3;
392 cp1 = mallocex(SMALLAMOUNT);
393 globalcontext->first = cp1;
394 cp2 = mallocex(TOOBIG);
395 cp3 = mallocex(SMALLAMOUNT);
405 printf("cp3=%s", cp3);
408 /* end_of_bad_example */
415 static void good_example(void)
417 global_context_t *global_context = xbt_malloc(sizeof(global_context_t));
421 char *volatile /*03 */ cp1 = NULL /*02 */ ;
422 char *volatile /*03 */ cp2 = NULL /*02 */ ;
423 char *volatile /*03 */ cp3 = NULL /*02 */ ;
425 cp1 = mallocex(SMALLAMOUNT);
426 global_context->first = cp1;
427 cp1 = NULL /*05 give away */ ;
428 cp2 = mallocex(TOOBIG);
429 cp3 = mallocex(SMALLAMOUNT);
433 TRY_CLEANUP { /*04 */
434 printf("cp3=%s", cp3 == NULL /*02 */ ? "" : cp3);
437 /*05 cp1 was given away */
440 /*05 global context untouched */
444 /* end_of_good_example */
446 #endif /* SIMGRID_TEST */